Curtain tieback



FIG. 1 is a top perspective view of a curtain tieback, showing my design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a left side elevation thereof.

FIG. 5 is a right side elevation thereof.

FIG. 6 is a top plan view thereof.

FIG. 7 is a bottom plan view thereof.

FIG. 8 is a perspective view showing a state of use of the curtain tieback with a curtain.

FIG. 9 is an enlarged view of an area labeled 9 in FIG. 1; and,

FIG. 10 is an enlarged view of an area labeled 10 in FIG. 2.

The broken lines in the drawings depict environmental structure and boundaries and form no part of the claimed design. 

CLAIM The ornamental design for a curtain tieback, as shown and described. 